Infrastructure support / fixes for making compiler server the default (…

…mono/mono#14279)

* Fix enabling the compiler server using autogen, and force it off if mcs is being used

* autogen updates

* Formatting fixes

* Fix vbcs getting turned on if unspecified even if mcs was selected

* Dynamically evaluate ENABLE_COMPILER_SERVER each time we compile instead of evaluating it once at some arbitrary point during makefile evaluation

* More detailed comment based on testing

* Handle the /shared option in genproj so it doesn't fail

* Raise basic profile check requirement to 6.2 and hopefully assert that named pipes work

* Default compiler server to off for now.


Commit migrated from mono/mono@add2a21

src/mono/configure.ac

@@ -6529,6 +6529,26 @@ if test x$host_darwin = xyes; then
    sed -e 's,lock_old_archive_extraction=yes,lock_old_archive_extraction=no,g' < libtool > libtool.new && mv libtool.new libtool && chmod +x libtool
 fi
 
+AC_MSG_CHECKING([compiler server])
+AC_ARG_WITH(compiler-server, [  --with-compiler-server=yes,no,default      Enables or disables compiler server],[
+   if test x$withval = xyes; then
+       enable_compiler_server=yes;
+   elif test x$withval = xno; then
+       enable_compiler_server=no;
+   elif test x$withval = xdefault; then
+       enable_compiler_server=no;
+   else
+       AC_MSG_ERROR([You must supply one of "yes", "no" or "default" to the --with-compiler-server option])
+   fi
+],[enable_compiler_server=no])
+
+if test x$enable_compiler_server = xyes; then
+   if test x$csc_compiler = xmcs; then
+       AC_MSG_WARN([mcs does not support the compiler server])
+       enable_compiler_server=no;
+   fi
+fi
+
 (
   case $prefix in
   NONE) prefix=$ac_default_prefix ;;
@@ -6699,8 +6719,9 @@ if test x$buildsgen = xyes; then
 fi
 
 echo "
-        mcs source:    $mcsdir
+	mcs source:    $mcsdir
 	C# Compiler:   $csc_compiler
+	CompilerServer:$enable_compiler_server
 
    Engine:
 	Host:	       $host

src/mono/msvc/scripts/genproj.cs

@@ -716,6 +716,9 @@ bool CSCParseOption (string option, ref string [] args)
 
 		case "/sourcelink":
 			return true;
+
+		case "/shared":
+			return true;
 		}
 
 		Console.Error.WriteLine ($"// Failing with : {arg}");